Frames

A road bike frame determines everything else — geometry dictates handling, material affects ride quality and weight, and standard compatibility locks in your component choices. Carbon dominates from mid-range up, but aluminium, steel, and titanium each have genuine advantages depending on your riding. Aero frames prioritise speed, endurance frames raise the front end for comfort, gravel frames add clearance and mounts. Getting the right frame size and type matters more than any component upgrade.

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Buying Guide

Road Bike Frame Buying Guide

Frame Materials

Carbon fibre is the default for performance frames — high stiffness-to-weight ratio, mouldable into aero shapes, and tuneable compliance through layup design. High-modulus carbon (Toray T800/T1000) is lighter and stiffer than standard modulus (T700) but more brittle on impact. Aluminium frames from brands like Canyon, Giant, and Cannondale are remarkably competitive — modern hydroforming and butting techniques have closed the gap on carbon significantly. Steel (Reynolds 725/853, Columbus Spirit) offers unmatched ride quality for touring and all-day riding, plus it's repairable. Titanium (Reynolds 3Al/2.5V, Dedacciai) is the forever frame — corrosion-proof, fatigue-resistant, and rides beautifully, but custom builds from Enigma, Moots, or Lynskey cost accordingly.

Frame Geometry

Stack (vertical height from BB to head tube top) and reach (horizontal distance from BB to head tube) are the two numbers that define fit. Race frames have low stack and long reach for an aggressive aero position. Endurance frames increase stack for a more upright, comfortable position. Head tube angle (73-74° race, 71-72° endurance) affects steering speed. Bottom bracket drop (65-75mm) affects stability. Chainstay length affects wheelbase and snappiness. Compare geometry charts between frames rather than relying on nominal sizing — a 56cm from one brand rides very differently from a 56cm from another.

Standards and Compatibility

Before buying a frame, check which standards it uses. Bottom bracket: threaded BSA/English is easiest to maintain; press-fit (BB86, PF30, BB386) can creak but is lighter. Seatpost diameter: 27.2mm is standard, many aero frames use proprietary D-shaped posts. Headset: most modern frames use 1-1/8" to 1-1/2" tapered. Thru-axle spacing: 12x100mm front, 12x142mm rear is standard for disc road. Quick-release is still found on rim brake frames. Electronic vs mechanical routing: some frames only route electronic groupsets. Check all of this before purchasing.

Buying Used Frames

Inspect carbon frames carefully — crash damage can be invisible. Look for cracks, dents, or paint ripples around the head tube junction, bottom bracket area, and dropouts. Tap test suspect areas: a clear ring means solid carbon, a dull thud suggests delamination. Aluminium shows crash damage more obviously (dents, creases) and cannot be repaired. Steel can be straightened and re-welded by a specialist. Check headset and bottom bracket faces aren't corroded. Verify the frame hasn't been recalled — manufacturers maintain recall databases online. Measure the frame yourself rather than trusting the seller's stated size.